public SpaceSim()
: base()
{
Content.RootDirectory = "Content";
World = this;
graphDev = new GraphicsDeviceManager(this);
}
protected override void Update(GameTime gameTime)
{
screenCenter = new Vector2((float)(Window.ClientBounds.Width / 2), (float)(Window.ClientBounds.Height / 2));
// bereken de distance van mouse en screen center
Vector2 distance = new Vector2(mousePosition.X - screenCenter.X, mousePosition.Y - screenCenter.Y);
distance.Normalize();
cameraPosition = Vector3.Transform(spaceshipFollowPoint, spaceship.Transform);
cameraLookAt = Vector3.Transform(spaceshipLookAtPoint, spaceship.Transform);
cameraOrientationMatrix = spaceshipOrientationMatrix;
// Helpers for input
KeyboardState keyboard = Keyboard.GetState();
wKeyDown = keyboard.IsKeyDown(Keys.W);
aKeyDown = keyboard.IsKeyDown(Keys.A);
sKeyDown = keyboard.IsKeyDown(Keys.S);
dKeyDown = keyboard.IsKeyDown(Keys.D);
if (keyboard.IsKeyDown(Keys.Escape))
{
Exit();
}
MouseState mouse = Mouse.GetState();
mousePosition = mouse.Position;
mouseButton = mouse.LeftButton == ButtonState.Pressed;
mouseDown = mouseButton && !lastMouseButton;
lastMouseButton = mouseButton;
skybox.Transform = Matrix.CreateScale(1000f) * Matrix.CreateTranslation(cameraPosition);
distance.X = -distance.X;
distance.Y = -distance.Y;
// add earth rotation update
Matrix earthRotation = Matrix.CreateRotationY((float)gameTime.ElapsedGameTime.TotalSeconds * 0.50f);
earth.Transform = earth.Transform * earthRotation;
// add mars rotation update
Matrix marsRotation = Matrix.CreateRotationY((float)gameTime.ElapsedGameTime.TotalSeconds * 0.30f);
mars.Transform = mars.Transform * marsRotation;
// add jupiter rotation update
Matrix jupiterRotation = Matrix.CreateRotationY((float)gameTime.ElapsedGameTime.TotalSeconds * 0.20f);
jupiter.Transform = jupiter.Transform * jupiterRotation;
// add saturn rotation update
Matrix saturnRotation = Matrix.CreateRotationY((float)gameTime.ElapsedGameTime.TotalSeconds * 0.14f);
saturn.Transform = saturn.Transform * saturnRotation;
// add uranus rotation update
Matrix uranusRotation = Matrix.CreateRotationY((float)gameTime.ElapsedGameTime.TotalSeconds * 0.07f);
uranus.Transform = uranus.Transform * uranusRotation;
// moon rotation update
moonRotation = moonRotation + gameTime.ElapsedGameTime.TotalSeconds * 1.5;
// scale and position of moon
moon.Transform = Matrix.CreateScale(0.5f);
moon.Transform *= Matrix.CreateTranslation(2f, 0.0f, 0.0f);
// create rotation on x and y relative to earth
moon.Transform *= Matrix.CreateRotationY((float)moonRotation);
moon.Transform *= Matrix.CreateRotationX((float)Math.PI / 4);
moon.Transform *= Matrix.CreateTranslation(Vector3.Transform(Vector3.Zero, earth.Transform));
// get user input to add to velocity
if (aKeyDown && rollVelocity < 200)
{
rollVelocity += 0.005f;
}
if (dKeyDown && rollVelocity > -200)
{
rollVelocity -= 0.005f;
}
if (wKeyDown && forwardVelocity < 0.25f)
{
forwardVelocity += 0.0005f;
}
if (sKeyDown && forwardVelocity > -0.25f)
{
forwardVelocity -= 0.0005f;
}
if (!wKeyDown && !sKeyDown)
{
forwardVelocity *= 0.96f;
}
// add velocity to ship
spaceshipPosition += forwardVelocity * spaceshipOrientationMatrix.Forward;
// orientate spaceship yaw pitch and roll
SpaceSim.RotateOrientationMatrixByYawPitchRoll(ref spaceshipOrientationMatrix, distance.X * 0.005f, distance.Y * 0.005f, rollVelocity);
spaceship.Transform = spaceshipOrientationMatrix * Matrix.CreateTranslation(spaceshipPosition);
// check if roll velocity goes above limits
if (rollVelocity > 200f)
{
rollVelocity = 200f;
}
else if (rollVelocity < -200f)
{
rollVelocity = -200f;
}
// check if forward velocity goes above limits
if (forwardVelocity > 100f)
{
forwardVelocity = 100f;
}
else if (forwardVelocity < -100f)
{
forwardVelocity = -100f;
}
// add drag if no button is pressed
if (!aKeyDown && !dKeyDown)
{
rollVelocity *= 0.95f;
}
// if mouse down shoot bullet
if (mouseDown)
{
bullets.Add(new Bullet(Vector3.Transform(bulletSpawnPosition, spaceship.Transform), spaceshipOrientationMatrix.Forward * (forwardVelocity + 10f)));
}
// update each bullet
foreach (Bullet bullet in bullets)
{
bullet.Update((float)gameTime.ElapsedGameTime.TotalSeconds);
}
// remove bullet if too far
for (int i = 0; i > bullets.Count; ++i)
{
if ((float)bullets[i].Position.Length() > 200)
{
bullets.RemoveAt(i);
}
}
base.Update(gameTime);
}
static void Main()
{
using (SpaceSim game = new SpaceSim())
game.Run();
}